A New Panzerism

Panzer on Jokes:

Panzer: Knock, Knock.

Mom: Hmmm?

Panzer: Knock, Knock.

Mom: Hmmm? What?

Panzer: I say, Knock, Knock, and You say, Who's there?

There's a first time for everything.Mom: Okay. Knock, Knock.

Panzer: Who's there?

Mom: It's me, Mom. You've known me your whole life, Panzer.

Panzer: What? Wait! I mean, what? Hey! What happened?